Get metrics from PHP-FPM and fix the truncated field problem

Telegraf
1

Hello,

I have many php-fpm socks on multple servers, and i use telegraf with [[inputs.phpfpm]] to send metrics to influxdb.
This work perfectly but … php-fpm himself sets truncated value for “host” field.
As I can’t find a workaround, in telegraf phpfpm input configuration, to override the tag value with a “dynamic” value that could be extracted from the path blob declared in parameter, I would like to know if anyone has ever encountered such a problem or how you’ll solve it.
regards

2

Hi,

In telegraf the host tag is usually the hostname of the system telegraf is running on. I do not see a host field in the phpfpm readme. Are you sure this isn’t the hostname of the system?

in telegraf phpfpm input configuration, to override the tag value with a “dynamic” value

You can use the starlark processor to do dynamic transformation of metrics after they are collected.

3

Sorry, this is not the “host” tag but the “pool” tag.
Thanks for starlark, it’s really interesting.
I use a wildcard in the “urls” parameter of phpfpm input, do you think I can access the exact url i’m on to extract the “pool” that is a folder in this url ?

4

Not sure I follow. Can you provide an example of what you are seeing and what you hope to achieve?

Thanks!

5

On each server to monitor, the php fpm sock are organizeded as:

/var/phpfpm/thissite.domain.com/php-fpm.sock
/var/phpfpm/mysite.mytoolongdomain.com/php-fpm.sock
[...]

Telegraf input is configured like this:

[[inputs.phpfpm]]
  urls = ["/var/phpfpm/*/php-fpm.sock:status"]

and sends metrics like that:

phpfpm,pool=mysite.mytoolongdomai accepted_conn=1i,active_processes=1i, [...]

The pool tag is truncated because of php-fpm status itself. I can confirm this when i query the sock with cgi-fcgi : pool is truncated.
So I need to get a full pool value, which is in the full file path of the sock.
Maybe I can get this information using starlark ?

6

Is the full pool value in any of the cgi-fcgi output?

Are you dropping the URL parameter as well? Looking at the readme I expected to see a URL tag.